Tzvetan Mikov

Announcing Hermes-node

Hermes can now run as a standalone CLI with Node.js-compatible APIs - no C++ embedding required.

Technically, hermes-node is a Node.js API compatibility layer for Hermes. It ports Node's native bindings (fs, net, http, child_process, etc.) to Node-API and reuses Node's original lib/*.js files, allowing standard Node.js programs to run on Hermes instead of V8. It vendors libuv, c-ares, llhttp, Ada, simdutf, etc to provide the same networking and I/O stack as Node, and runs as a standalone CLI binary.

In this demo:
- REPL with tab completion
- TypeScript HTTP server using http, fs, and path
- Type annotations stripped natively by the parser — no transpiler, not even a built-in one.

This is still a work in progress, though surprisingly functional. More Node modules coming, source will be published soon.

Just voted. Instead of showing ID, I had to spell my weird name a couple of times, had to recite my home address. This is laughable.

Today anyone can generate a PR for Hermes with an agent. Sometimes people get disappointed if we don't accept it.

But think about this: if Hermes starts crashing, or becomes slow, or any problem appears, who is responsible for fixing it?

I can think of another reason why it is pointless to save money, but it is much more pessimistic 😅

Full Intl implementation for Hermes, based on ICU4X. Agents finally made it practical to develop and maintain internally.

It resolves all long-standing problems of the previous implementation, which was limited due to the inadequacies of the OS APIs.

github.com/tmikov/hermes/…